Museum Homepage

The San Mateo County Historical Association
Online Collections Database

The mission of the San Mateo County Historical Association is to inspire wonder and discovery
of the cultural and natural history of San Mateo County.

Object Record

  • Email This Page
  • Send Feedback
Catalog Number 2016.001.045A-D
Description Raychem Wires and Duraseal Wire Splices, c. 1957-1999. Three fragments of coated wires and two Duraseal wire splices. All the wires are metal wire coated in a white plastic. Wire (A) is ten inches long. One side has black and brown scorch marks .75 inch long and .25 inch from the very end. Wire (B) might be two wires joined together. In the center of the wires is a metal tube. The tube is golden in color. A small silver-colored cuff fits around the metal tube. The tube has a smaller gold-colored piece going into it. An additional plastic coating covers both ends of the golden-colored tube and also covers the wires for two inches on either side. Wire (C) has a Duraseal wire splice attached to one end. The nylon wire splice is light blue and transparent. It is a tube which indents twice in near the center. On the interior of the wire splice is a copper alloy ring. The wire's end is stripped of the coating and is sealed on the outside of the metal ring under the coupling plastic. Piece (C) is another light blue Duraseal wire splice. This wire splice narrows at one end to almost a point. The narrow end encloses on a non-coated piece of wire. The part of the wire outside the coupling is slightly bent at the end.
Object Name Coupling
Collection 3D - Mechanical Tools & Equipment
Title Raychem Wires and Duraseal Splices, c. 1957-1999
Date c. 1957-1999
Creator Raychem Corporation, Menlo Park
Role Manufacturer
Inscription Text "RAYCHEM CORPORATION / 920608-03" (printed in black on both sides of wire B's second layer of plastic coating).
Notes Wire splices "connect two solid or stranded wire ends together to repair or lengthen wires... an insulated heat shrink butt splice connector provides a compression type connection that is vibration and moisture resistant, stable, and acts to protect against accidental wire pull-out. The insulation material surrounding the connector completely seals the terminal when heated".
[ 1/20/2016]

"Raychem was founded on January 1, 1957. It grew rapidly by creating proprietary new products based on Radiation processing of polymers to meet critical and difficult industry needs for electrical circuit integrity in harsh environments. Included in these initial products were irradiated wire insulation and heat shrinkable tubing. Markets included Aerospace, Military, Automotive, Telecommunications and Electrical Power Generation markets.
"In 1968, Raychem acquired Chemelex leading Raychem to extend its radiation polymer processing technology to polymers filled with conductive carbon creating a family of "Self Limiting Heaters". This technology was further extended to produce resettable switches forming the enabling technology for the "Polyswitch" Division.
"As Raychem grew into a world class Material Science Company, additional technologies explored, developed and taken to market were Heat Recoverable Metals, Piezoelectric Materials (Elographics), Silicone Gels (Geltek) and Liquid Crystals (Taliq).
"Each year, Raychem devoted between 8 and 10 percent of sales into Research and Development resulting in thousands of new products based on the technologies listed above. Research and Product Development labaratories, in addition to Menlo Park and Redwood City were established in Swindon, UK, Kessel-Lo, Belgium, Ottobrunn, Germany, Pontois, France and Japan.
"Manning these laboratories were an extremely creative and talented group of scientists and engineers who found innovative ways to use technologies to create new products."
[ 12/31/2015]
Dimensions H-0.125 W-0.125 D-10 inches
Dimension Details Longest wire B; .125 x 1 (coupling C)
Search Terms Industry
Menlo Park
Subjects Electricity